public void TestContainsValue()
{
LRUCache <String, String> underTest = new LRUCache <String, String>(666);
underTest.Add("key1", "value1");
underTest.Add("key2", "value2");
underTest.Add("key3", "value3");
Assert.That(underTest.Count == 3);
Assert.That(underTest.ContainsValue("value1"));
Assert.That(underTest.ContainsValue("value2"));
Assert.That(underTest.ContainsValue("value3"));
Assert.IsFalse(underTest.ContainsValue("value4"));
}